business challenge, dell has the technology and services to help you solve it. woman: we're helping joplin, missouri, come back from a devastating tornado. man: and now we're helping the east coast recover from hurricane sandy. we're a leading global insurance company, based right here in america. we've repaid every dollar america lent us. everything, plus a profit of more than $22 billion. for the american people. thank you, america. helping people recover and rebuild -- that's what we do. now let's bring on tomorrow. request >> joining us now in their first appearance on "face the nation," joaquin castro, who is the new congressman from san antonio; and julian castro, who serves the residents of that city in another way. he is the mayor. julian was also the keynote speaker at the democratic convention. and as you may have suspected, they are identical twins. and i'll tell you, one of of the most fun moments for me at the democratic convention, i was walking down the street in charlotte, just walking down the street and somebody hollered to me and said, "hey, bob, my brother is the keynot
